Exceptional behavior of d-like surface resonances on W(110): the one-step model in its density matrix formulation
Spin–orbit-induced spin splitting of surface states has attracted great interest in recent years because of the high potential for technological applications associated with this phenomenon. This Rashba physics is found in a variety of systems ranging from simple metals like Ag or Au to the so-calle...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2014-01-01
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| Series: | New Journal of Physics |
| Online Access: | https://doi.org/10.1088/1367-2630/16/1/015005 |
| _version_ | 1797751494968082432 |
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| author | J Braun K Miyamoto A Kimura T Okuda M Donath H Ebert J Minár |
| author_facet | J Braun K Miyamoto A Kimura T Okuda M Donath H Ebert J Minár |
| author_sort | J Braun |
| collection | DOAJ |
| description | Spin–orbit-induced spin splitting of surface states has attracted great interest in recent years because of the high potential for technological applications associated with this phenomenon. This Rashba physics is found in a variety of systems ranging from simple metals like Ag or Au to the so-called topological insulators which are of special interest in spintronics. A very special and unique case is found at the W(110) surface. In this metal d-like surface resonances exhibit energy dispersions and spin-polarization structures which are reminiscent of topological surface states. In our theoretical study, we present a complete analysis of the surface electronic structure of W(110) and show that the atypical linear-shaped dispersion behavior is triggered by the amount of charge transfer from the bulk into the first few vacuum layers. Furthermore, we compare our theoretical spectra with experimental photoemission data on W(110) and demonstrate that our state-of-the-art photoemission theory is able to deal with these peculiar surface features in a quantitative way. Our analysis is based on a generalization of the relativistic one-step model of photoemission, recently extended by us to study photoelectron spectroscopy at high photon energies. This theoretical approach was realized in the full spin-density matrix formulation for the photocurrent, which allows for an unrestricted calculation of the spin-polarization vector of the photoelectron. As an additional result we predict very peculiar behavior of these surface features showing up even at soft and hard x-ray energies. This observation is very surprising, unprecedented for ordinary surface features on simple metal surfaces. |
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| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:50:24Z |
| publishDate | 2014-01-01 |
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| series | New Journal of Physics |
| spelling | doaj.art-37d9e804249543b1aefa5702efff63932023-08-08T11:21:30ZengIOP PublishingNew Journal of Physics1367-26302014-01-0116101500510.1088/1367-2630/16/1/015005Exceptional behavior of d-like surface resonances on W(110): the one-step model in its density matrix formulationJ Braun0K Miyamoto1A Kimura2T Okuda3M Donath4H Ebert5J Minár6Department Chemie, Ludwig-Maximilians-Universität München , Butenandtstrasse 5-13, D-81377 München, GermanyHiroshima Synchrotron Radiation Center, Hiroshima University , 2-313 Kagamiyama, Higashi-Hiroshima 739-0046, JapanGraduate School of Science, Hiroshima University , 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, JapanHiroshima Synchrotron Radiation Center, Hiroshima University , 2-313 Kagamiyama, Higashi-Hiroshima 739-0046, JapanPhysikalisches Institut, Westfälische-Wilhelms-Universität , Münster, Wilhelm-Klemm-Strasse 10, D-48149 Münster, GermanyDepartment Chemie, Ludwig-Maximilians-Universität München , Butenandtstrasse 5-13, D-81377 München, GermanyDepartment Chemie, Ludwig-Maximilians-Universität München , Butenandtstrasse 5-13, D-81377 München, GermanySpin–orbit-induced spin splitting of surface states has attracted great interest in recent years because of the high potential for technological applications associated with this phenomenon. This Rashba physics is found in a variety of systems ranging from simple metals like Ag or Au to the so-called topological insulators which are of special interest in spintronics. A very special and unique case is found at the W(110) surface. In this metal d-like surface resonances exhibit energy dispersions and spin-polarization structures which are reminiscent of topological surface states. In our theoretical study, we present a complete analysis of the surface electronic structure of W(110) and show that the atypical linear-shaped dispersion behavior is triggered by the amount of charge transfer from the bulk into the first few vacuum layers. Furthermore, we compare our theoretical spectra with experimental photoemission data on W(110) and demonstrate that our state-of-the-art photoemission theory is able to deal with these peculiar surface features in a quantitative way. Our analysis is based on a generalization of the relativistic one-step model of photoemission, recently extended by us to study photoelectron spectroscopy at high photon energies. This theoretical approach was realized in the full spin-density matrix formulation for the photocurrent, which allows for an unrestricted calculation of the spin-polarization vector of the photoelectron. As an additional result we predict very peculiar behavior of these surface features showing up even at soft and hard x-ray energies. This observation is very surprising, unprecedented for ordinary surface features on simple metal surfaces.https://doi.org/10.1088/1367-2630/16/1/015005 |
| spellingShingle | J Braun K Miyamoto A Kimura T Okuda M Donath H Ebert J Minár Exceptional behavior of d-like surface resonances on W(110): the one-step model in its density matrix formulation New Journal of Physics |
| title | Exceptional behavior of d-like surface resonances on W(110): the one-step model in its density matrix formulation |
| title_full | Exceptional behavior of d-like surface resonances on W(110): the one-step model in its density matrix formulation |
| title_fullStr | Exceptional behavior of d-like surface resonances on W(110): the one-step model in its density matrix formulation |
| title_full_unstemmed | Exceptional behavior of d-like surface resonances on W(110): the one-step model in its density matrix formulation |
| title_short | Exceptional behavior of d-like surface resonances on W(110): the one-step model in its density matrix formulation |
| title_sort | exceptional behavior of d like surface resonances on w 110 the one step model in its density matrix formulation |
| url | https://doi.org/10.1088/1367-2630/16/1/015005 |
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